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Scoping Document 1 for Saluda Dam FERC No FEDERAL ENERGY REGULATORY COMMISSION Washington, DC 20426 DATE: May 03, 2002 MEMORANDUM TO: The Agency/Party Addressed SUBJECT: Scoping of environmental issues for seismic remediation of the Saluda Dam, Saluda Hydroelectric Project, FERC No. P-516, South Carolina The Federal Energy Regulatory Commission (Commission) is requiring the seismic remediation of Saluda Dam at the Saluda Hydroelectric Project (FERC No. 516), licensed to South Carolina Electric and Gas Company. The project is located on the Saluda River, in Richland, Lexington, Newberry, and Saluda counties, South Carolina. The Commission intends to prepare an Environmental Assessment (EA) for the Saluda Dam Remediation Project, which will be used by the Commission to identify project impacts and to identify measures that may help mitigate the impacts caused by the project. To support and assist our environmental review, we are beginning the public scoping process to ensure that all pertinent issues are identified and analyzed, and that the environmental document is thorough and balanced. We invite your participation in the scoping process, and are circulating the attached Scoping Document 1 (SD1) to provide you with information on the remediation project. We solicit your comments and suggestions on the SD1, which contains our preliminary list of issues and alternatives to be addressed in the EA. We will hold two scoping meetings on May 17, 2000, to receive input on the appropriate scope of the environmental analysis. Both meetings will be held at the Embassy Suites Hotel, 200 Stoneridge Drive, Columbia, SC. A resource agency meeting will be held from 9:00 a.m to 12:00 noon. The public meeting will be held 7:00 p.m. until 9:00 p.m. The public and agencies may attend either or both meetings. The agency scoping meeting will focus on resource agency and non-governmental organization (NGO) concerns, while the public scoping meeting is primarily for public input. Please review SD1 and, if you wish to provide comments, follow the instructions in section 3.0. If you have any questions concerning the scoping process, or the development of the EA for this project, please call John Mudre at (202) 219-1208. Enclosure: Scoping Document 1 -2- cc: Mailing List Public Files SCOPING DOCUMENT 1 SALUDA DAM SEISMIC REMEDIATION PROJECT SOUTH CAROLINA FERC Project No. 516 Federal Energy Regulatory Commission Office of Hydropower Licensing Washington, DC May 2002 TABLE OF CONTENTS Section Page 1.0 INTRODUCTION ..........................................................1 2.0 SCOPING ................................................................3 2.1 Purpose of Scoping .................................................3 2.2 Scoping Meetings ...................................................4 3.0 REQUEST FOR INFORMATION .............................................5 4.0 PROPOSED ACTION AND ALTERNATIVES ...................................6 4.1 Applicant’s Proposed Action ..........................................6 4.1.1 Description of Project Remediation .................................6 4.1.2 Proposed Mitigative and Enhancement Measures ......................7 4.2 Applicant’s Proposed Action With Commission Staff’s Modifications ............7 4.3 No-action Alternative ................................................7 4.4 Alternatives Considered But Eliminated From Detailed Analysis ................7 4.4.1 No-action Alternative ..........................................8 5.0 SCOPE OF CUMULATIVE EFFECTS ANALYSIS AND ENVIRONMENTAL ISSUES ..............................................8 5.1 Cumulative Effects ..................................................8 5.1.1 Geographic Scope .............................................8 5.1.2 Temporal Scope ..............................................8 5.2 Resource Issues ....................................................9 5.2.1 Water Use and Quality ..........................................9 5.2.2 Aquatic Resources .............................................9 5.2.3 Terrestrial Resources ..........................................10 5.2.4 Threatened and Endangered Species ..............................10 5.2.5 Recreational Resources ........................................11 5.2.6 Land Use and Aesthetic Resources ................................11 5.2.7 Cultural Resources ............................................11 5.2.8 Socioeconomic Resources .......................................11 6.0 EA PREPARATION SCHEDULE .............................................12 7.0 PROPOSED EA OUTLINE ..................................................12 8.0 DISTRIBUTION LIST ......................................................14 -iv- LIST OF FIGURES Figure 1. General location of the Saluda Project and Lake Murray ......................2 -v- 1.0 INTRODUCTION The Federal Energy Regulatory Commission (Commission), under the authority of the Federal Power Act (FPA), licenses and oversees the operation of non-federal hydropower projects in the United States. As part of its oversight capacity, the Commission implements a dam safety program, through its Division of Dam Safety and Inspections (D2SI), to ensure that Commission-licensed projects comply with Federal dam safety standards and are designed constructed, and operated safely. Under 18 C.F.R. Part 12, the D2SI Regional Engineer has the authority to, among other things, require a licensee to take an action to repair or modify project works for the purpose of achieving or protecting the safety, stability, and integrity of project works. It has been determined that the Saluda Dam near Columbia, SC (Figure 1) would fail if subjected to a repeat of the Charleston Earthquake that occurred in 1886. The magnitude of the Charleston earthquake is estimated by seismologists, including the United States Geological Survey, to be about 7.3. The Saluda Dam must be strengthened to withstand earthquakes in the interest of public safety for the thousands of people living downstream. Consequently, the D2SI Director has directed South Carolina Gas and Electric Company (SCE&G), licensee for the Saluda Project (FERC No. 516), to design and construct a seismic stabilization of the Saluda Dam. Several alternatives were considered and it was concluded that a composite structure comprised of a rock fill berm in the downstream slope at the downstream toe of the existing dam and a free-standing roller compacted concrete dam at the downstream toe of the existing dam (where the rockfill berm would not fit due to space limitations) should be constructed. On March 25, 2002, SCE&G submitted the 95% complete design and plans and specifications package for Commission review. Although it was initially believed that remediation of the dam could be conducted without an impact to water levels in the Saluda Dam impoundment (i.e., Lake Murray), subsequent analyses, completed in March 2002, revealed the necessity of lowering Lake Murray to elevation 345 to ensure public safety during construction activities at the toe of the dam. This represents a 7 - 13 foot decrease from the normal Lake Murray water level, which varies seasonally, and is within the operating range allowed by the project license. The Commission's Regulations categorically exclude from review under the National Environmental Policy Act of 1969 (NEPA)1, certain types of actions which do 1 National Environmental Policy Act of 1969, as amended (Pub. L. 91-190. 42 U.S.C. 4321-4347, January 1, 1970, as amended by Pub. L.94-52, July 3, 1975, Pub. L. 94- 83, August 9, 1975, and Pub. L. 97-258, section 4 (b), Sept. 13, 1982). -2- -3- not have a significant effect on the human environment.2 This categorical exclusion applies to compliance actions involving dam safety. However, the regulations also provide an exception to such categorical exclusions by stating that the Commission may consider public comment, and will prepare an environmental document, where circumstances indicate that an action may be a major federal action significantly affecting the quality of the human environment.3 In order to determine whether the Saluda Dam seismic remediation project is a major federal action significantly affecting the quality of the human environment and in order to identify mitigative measures may be implemented to reduce the impacts of the remediation project, the Commission staff intends to prepare an Environmental Assessment (EA) that describes and evaluates the probable effects, including an assessment of the site-specific and cumulative effects, if any, of the proposed action and alternatives. The EA preparation will be supported by a scoping process to ensure the identification and analysis of all pertinent issues. 2.0 SCOPING 2.1 Purpose of Scoping Scoping is the process used to identify issues, concerns, and opportunities associated with a proposed action; the process, according to the NEPA, should be conducted early in the planning stages of the project. The purposes of this Scoping Document 1 (SD1) are as follows: • Invite participation of federal, state, and local resource agencies; Native American tribes; and individuals to identify significant environmental issues related to the proposed action. • Determine the depth of analysis and significance of issues to be addressed in the EA. C Identify how the project would or would not contribute to cumulative impacts in the project area and the Saluda River basin. C Identify reasonable alternatives to the project that we should evaluate. 2 18 C.F.R. 380.4(a)(3) 3 18 C.F.R. 380.4(b) -4- Following the comment period for this SD1, all issues
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